:root{
  --bg:#fff4e6; --bg2:#ffe9f1; --card:#ffffff; --ink:#2b2340; --ink2:#5b5270;
  --pink:#ff8fb1; --pink-d:#c9356b; --yellow:#ffc93c; --yellow-d:#c48a00; --teal:#16b3a3; --teal-d:#0b7d72;
  --purple:#7b5cff; --purple-d:#4f35c9; --line:#2b2340; --soft:#f3ecff; --ok:#13875a; --bad:#c42b48;
  --radius:18px; --shadow:0 6px 0 rgba(43,35,64,.12), 0 14px 30px rgba(43,35,64,.08);
  --display:"Baloo 2", ui-rounded, "Arial Rounded MT Bold", system-ui, sans-serif;
  --ui:system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth; -webkit-text-size-adjust:100%}
body{margin:0; background:var(--bg); color:var(--ink); font:16px/1.55 var(--ui); overflow-x:hidden}
img,svg{max-width:100%}
a{color:var(--purple-d)}
h1,h2,h3{font-family:var(--display); line-height:1.08; margin:0 0 .4em}
h2{font-size:clamp(30px,5vw,44px)}
h3{font-size:22px}
.wrap{max-width:1160px; margin:0 auto; padding:0 16px}
.sr{position:absolute; width:1px; height:1px; overflow:hidden; clip:rect(0 0 0 0)}
.skip{position:absolute; left:-999px; top:8px; background:var(--ink); color:#fff; padding:8px 12px; border-radius:8px; z-index:99}
.skip:focus{left:8px}
.eyebrow{font:700 14px/1 var(--ui); letter-spacing:.08em; text-transform:uppercase; color:var(--pink-d); margin:0 0 10px}
.lead{font-size:18px; color:var(--ink2); max-width:640px}
.tiny{font-size:13px; color:var(--ink2)}
.muted{color:var(--ink2)}
.card{background:var(--card); border:3px solid var(--line); border-radius:var(--radius); box-shadow:var(--shadow)}

/* buttons: chunky, squared-rounded, outlined */
.btn{display:inline-flex; align-items:center; justify-content:center; gap:8px; font:800 17px/1 var(--display); color:var(--ink);
  border:3px solid var(--line); border-radius:12px; padding:13px 18px; cursor:pointer; text-decoration:none;
  box-shadow:0 4px 0 var(--line); transition:transform .12s, box-shadow .12s; background:#fff; min-height:48px}
.btn:hover{transform:translateY(-2px); box-shadow:0 6px 0 var(--line)}
.btn:active{transform:translateY(3px); box-shadow:0 1px 0 var(--line)}
.btn:focus-visible,.chips button:focus-visible,.tab:focus-visible,.brain-btn:focus-visible,input:focus-visible,textarea:focus-visible{outline:4px solid var(--purple); outline-offset:3px}
.btn-pink{background:var(--pink)} .btn-yellow{background:var(--yellow)} .btn-teal{background:#5ee0d2} .btn-purple{background:#c8b8ff}
.btn.big{width:100%; font-size:20px; padding:16px}
.btn[disabled]{opacity:.6; cursor:wait}
.icon-btn{border:2px solid var(--line); background:#fff; border-radius:10px; width:38px; height:38px; cursor:pointer; font-size:18px}

/* header */
.top{position:sticky; top:0; z-index:20; background:rgba(255,244,230,.94); backdrop-filter:blur(8px); border-bottom:3px solid var(--line)}
.top-in{display:flex; align-items:center; gap:16px; padding-top:8px; padding-bottom:8px; flex-wrap:wrap}
.logo{display:flex; align-items:center; gap:8px; text-decoration:none; color:var(--ink); font:800 24px/1 var(--display)}
.logo b{color:var(--pink-d)}
.nav{display:flex; gap:4px; margin-left:auto; flex-wrap:wrap}
.nav a{font:700 15px/1 var(--ui); color:var(--ink); text-decoration:none; padding:10px 10px; border-radius:10px}
.nav a:hover{background:#fff}
.bbb{display:inline-block; line-height:0}
.bbb img{width:200px; height:auto}

/* hero */
.hero{background:radial-gradient(1200px 500px at 20% 0%, #ffe0ec 0%, transparent 60%), radial-gradient(900px 500px at 100% 20%, #e3f8ff 0%, transparent 60%); padding:28px 0 40px}
.hero-grid{display:grid; grid-template-columns: minmax(280px,1fr) minmax(320px,1.1fr); gap:36px; align-items:start}
.hero-grid>*,.feed-grid>*,.kids-grid>*,.chat{min-width:0}
.brain-col{position:sticky; top:96px; display:flex; flex-direction:column; align-items:center}
.brain-btn{background:none; border:0; padding:0; cursor:pointer; width:min(100%,420px); -webkit-tap-highlight-color:transparent}
.brain{width:100%; height:auto; overflow:visible; display:block}
.brain-shape{fill:var(--pink); stroke:var(--pink-d); stroke-width:6; stroke-linejoin:round}
.crease,.wrinkle{fill:none; stroke:var(--pink-d); stroke-width:5; stroke-linecap:round; opacity:.75}
.brow{fill:none; stroke:var(--line); stroke-width:6; stroke-linecap:round; transition:transform .25s}
#brainBody{transform-origin:160px 280px; animation:float 4.5s ease-in-out infinite}
#jaw{transform-origin:160px 172px; transform:scaleY(.18); transition:transform .14s ease-out}
.brain.open #jaw{transform:scaleY(1)}
.eye{transform-box:fill-box; transform-origin:center; transition:transform .08s}
.brain.blink .eye{transform:scaleY(.08)}
.pupil,.shine{transition:transform .12s ease-out}
.sprout{transform-origin:160px 46px; animation:sway 3s ease-in-out infinite}
.brain.laugh #brainBody{animation:wiggle .5s ease-in-out 3}
.brain.confused #brainBody{animation:none; transform:rotate(-7deg)}
.brain.confused #browL{transform:translateY(-8px)}
.brain.confused #sweat{opacity:1}
.brain.sad #browL{transform:rotate(10deg) translate(4px,0); transform-origin:146px 98px}
.brain.sad #browR{transform:rotate(-10deg) translate(-4px,0); transform-origin:174px 98px}
.brain.think #browL,.brain.think #browR{transform:translateY(-6px)}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
@keyframes sway{0%,100%{transform:rotate(-6deg)}50%{transform:rotate(6deg)}}
@keyframes wiggle{0%,100%{transform:rotate(0)}25%{transform:rotate(-5deg)}75%{transform:rotate(5deg)}}
.bubble{position:relative; background:#fff; border:3px solid var(--line); border-radius:16px; padding:10px 14px; font:700 18px/1.3 var(--display);
  max-width:320px; text-align:center; box-shadow:0 4px 0 var(--line); margin-bottom:6px; min-height:48px}
.bubble:after{content:""; position:absolute; left:50%; bottom:-14px; width:20px; height:20px; background:#fff; border-right:3px solid var(--line); border-bottom:3px solid var(--line); transform:translateX(-50%) rotate(45deg)}
.stage-card{width:min(100%,380px); margin-top:4px; text-align:center}
.stage-line{font:800 24px/1.2 var(--display)}
.stage-day{color:var(--ink2); font-size:18px}
.meter{height:16px; background:#fff; border:3px solid var(--line); border-radius:10px; overflow:hidden; margin:8px 0 6px}
.meter span{display:block; height:100%; background:linear-gradient(90deg,var(--teal),#7be7a3); transition:width .8s}
.stage-next{margin:0; font-size:14px; color:var(--ink2)}
.hero-title{font-size:clamp(40px,6.4vw,72px); letter-spacing:-.01em}
.hero-title span{color:var(--pink-d); white-space:nowrap}
.hero-sub{font-size:19px; color:var(--ink2); max-width:560px; margin:0 0 18px}
.hero-cta{display:flex; gap:12px; flex-wrap:wrap; margin-bottom:22px}

/* chat */
.chat{display:flex; flex-direction:column; overflow:hidden}
.chat-head{display:flex; justify-content:space-between; align-items:center; padding:10px 14px; background:var(--soft); border-bottom:3px solid var(--line); font:800 20px/1 var(--display)}
.offline-note{background:#fff6cf; border-bottom:2px dashed var(--yellow-d); padding:8px 14px; font-size:14px}
.log{height:360px; overflow-y:auto; padding:14px; display:flex; flex-direction:column; gap:10px; background:#fffdf9; overscroll-behavior:contain}
.msg{max-width:88%; padding:10px 13px; border:2.5px solid var(--line); border-radius:14px; white-space:pre-line; overflow-wrap:anywhere}
.msg.me{align-self:flex-end; background:#dff7f3; border-bottom-right-radius:4px}
.msg.bot{align-self:flex-start; background:#fff; border-bottom-left-radius:4px}
.msg .tag{display:inline-block; font:700 11px/1 var(--ui); letter-spacing:.04em; text-transform:uppercase; background:var(--soft); border:1.5px solid var(--line); border-radius:6px; padding:4px 6px; margin-bottom:6px}
.tag.growing{background:#e7ffe9} .tag.memory{background:#fff3c4} .tag.math{background:#e3f1ff} .tag.safety{background:#ffe3e3}
.msg .acts{display:flex; gap:6px; margin-top:8px; flex-wrap:wrap}
.msg .acts button{font:700 13px/1 var(--ui); border:2px solid var(--line); background:#fff; border-radius:8px; padding:7px 9px; cursor:pointer; min-height:34px}
.msg .acts button.chosen{background:var(--yellow)}
.msg .hint{display:block; margin-top:6px; font-size:13px; color:var(--ink2)}
.typing{align-self:flex-start; font:700 15px var(--display); color:var(--ink2)}
.chips{display:flex; gap:8px; padding:10px 12px 0; overflow-x:auto; scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chips button{flex:0 0 auto; font:700 14px/1 var(--ui); border:2px solid var(--line); background:#fff; border-radius:10px; padding:10px 12px; cursor:pointer; min-height:40px}
.chips button:hover{background:#fff6cf}
.ask{display:flex; gap:8px; padding:12px}
.ask input{flex:1; min-width:0; font:16px var(--ui); border:3px solid var(--line); border-radius:12px; padding:12px; background:#fff; color:var(--ink)}

/* stats */
.stats-band{background:var(--ink); color:#fff; border-top:3px solid var(--line); border-bottom:3px solid var(--line)}
.stats{display:grid; grid-template-columns:repeat(5,1fr); gap:10px; padding-top:18px; padding-bottom:18px; text-align:center}
.stat b{display:block; font:800 32px/1 var(--display); color:var(--yellow)}
.stat span{font-size:14px; color:#f1ecff}
.stat a{color:#c8b8ff; text-decoration:none}

/* sections */
.section{padding:64px 0}
.feed-sec{background:linear-gradient(180deg,var(--bg2),var(--bg))}
.feed-grid{display:grid; grid-template-columns:1fr 1fr; gap:36px; align-items:start}
.mini-brain{position:relative; width:150px; margin:8px 0 16px}
.mini-brain .mini-mouth{transform-origin:59px 60px; transition:transform .15s}
.mini-brain.chomp .mini-mouth{animation:chomp .22s ease-in-out 4}
@keyframes chomp{50%{transform:scaleY(.25)}}
.flying{position:absolute; left:120px; top:20px; font-size:34px; opacity:0; pointer-events:none}
.flying.go{animation:fly .7s ease-in forwards}
@keyframes fly{0%{opacity:1; transform:translate(140px,-30px) scale(1.2)}100%{opacity:0; transform:translate(-62px,40px) scale(.4)}}
.rules{padding:16px 18px}
.rules h3{margin:4px 0 4px; font-size:20px}
.rules ul{margin:0 0 8px; padding-left:20px}
.feed-form{padding:20px}
.tabs{display:grid; grid-template-columns:repeat(3,1fr); gap:6px; margin-bottom:14px}
.tab{font:800 16px/1 var(--display); border:3px solid var(--line); background:#fff; border-radius:12px; padding:12px 6px; cursor:pointer; min-height:46px}
.tab.on{background:var(--yellow); box-shadow:0 3px 0 var(--line)}
.field{display:flex; flex-direction:column; gap:6px; margin-bottom:14px; position:relative}
.field label{font-weight:700}
.field input,.field textarea{font:16px var(--ui); border:3px solid var(--line); border-radius:12px; padding:12px; background:#fffdf9; color:var(--ink); resize:vertical}
.count{position:absolute; right:10px; bottom:8px; font-size:12px; color:var(--ink2)}
.agree{display:flex; gap:10px; align-items:flex-start; margin:4px 0 16px; font-size:15px}
.agree input{width:22px; height:22px; margin-top:1px; accent-color:var(--pink-d); flex:0 0 auto}
.feed-msg{min-height:24px; font-weight:700; margin:12px 0 6px}
.feed-msg.ok{color:var(--ok)} .feed-msg.bad{color:var(--bad)}

/* evolution */
.path{list-style:none; padding:0; margin:22px 0 0; display:grid; grid-template-columns:repeat(8,1fr); gap:10px}
.path li{background:#fff; border:3px solid var(--line); border-radius:14px; padding:12px 6px; text-align:center; position:relative}
.path li .e{display:block; font-size:34px; line-height:1.1}
.path li b{display:block; font:800 16px/1.1 var(--display); margin-top:4px}
.path li small{display:block; font-size:11px; color:var(--ink2); margin-top:4px}
.path li.done{background:#e7ffe9}
.path li.now{background:var(--yellow); box-shadow:0 5px 0 var(--line); transform:translateY(-4px)}
.path li.locked{opacity:.65}
.path li.now:after{content:"YOU ARE HERE"; position:absolute; top:-12px; left:50%; transform:translateX(-50%); background:var(--ink); color:#fff; font:700 10px/1 var(--ui); padding:4px 6px; border-radius:6px; white-space:nowrap}

/* how */
.how{background:#f1fbff}
.steps{display:grid; grid-template-columns:repeat(3,1fr); gap:18px; margin:22px 0}
.step{padding:20px}
.num{display:inline-grid; place-items:center; width:42px; height:42px; border-radius:12px; border:3px solid var(--line); background:var(--pink); font:800 22px var(--display); margin-bottom:10px}
.lobes{padding:20px}
.lobes ul{margin:0; padding-left:20px; columns:2; column-gap:30px}
.lobes li{margin-bottom:6px; break-inside:avoid}

/* kids */
.kids{background:linear-gradient(180deg,#fff9d9,var(--bg))}
.kids-grid{display:grid; grid-template-columns:1.3fr 1fr; gap:30px; align-items:start}
.kid-btns{display:grid; grid-template-columns:1fr 1fr; gap:12px; margin:18px 0}
.leaders{padding:20px}
.leaders ol{margin:0; padding-left:22px}
.leaders li{padding:6px 0; border-bottom:2px dashed #eee; font-weight:700}
.leaders li span{float:right; color:var(--ink2); font-weight:600}

/* journey */
.journey{list-style:none; padding:0; margin:22px 0 0; border-left:4px solid var(--line); max-width:760px}
.journey li{position:relative; padding:0 0 22px 24px}
.journey li:before{content:""; position:absolute; left:-12px; top:4px; width:20px; height:20px; border-radius:50%; background:var(--pink); border:3px solid var(--line)}
.journey time{display:block; font-size:13px; color:var(--ink2); font-weight:700}
.journey b{display:block; font:800 21px/1.2 var(--display)}
.journey span{color:var(--ink2)}

/* faq */
.faq-list{max-width:820px; display:grid; gap:12px; margin-top:20px}
.faq details{background:#fff; border:3px solid var(--line); border-radius:14px; padding:4px 16px}
.faq summary{font:800 19px/1.3 var(--display); cursor:pointer; padding:12px 0; list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+"; float:right; font-size:24px; line-height:1}
.faq details[open] summary:after{content:"–"}
.faq-a{margin:0 0 14px; color:var(--ink2)}

/* footer */
.foot{background:#ffe9f1; border-top:3px solid var(--line); padding:34px 0 12px}
.foot-in{display:flex; justify-content:space-between; gap:24px; flex-wrap:wrap; align-items:flex-start}
.foot p{margin:8px 0; max-width:560px}
.foot .links a{font-weight:700}
.copy{text-align:center; font-size:13px; color:var(--ink2); margin:18px 0 8px}
.sig{display:flex; align-items:center; justify-content:center; gap:8px; padding:10px 0 18px; font-weight:700}
.sig a{color:var(--ink); text-decoration:none}
.sig a:hover{text-decoration:underline}
.heart{animation:beat 1.6s ease-in-out infinite; transform-origin:center}
@keyframes beat{0%,100%{transform:scale(1)}15%{transform:scale(1.18)}30%{transform:scale(1)}45%{transform:scale(1.12)}}

/* responsive */
@media (max-width:980px){
  .hero-grid{grid-template-columns:1fr; gap:10px}
  .brain-col{position:relative; top:0}
  .brain-btn{width:min(80vw,340px)}
  .hero-copy{text-align:left}
  .feed-grid,.kids-grid{grid-template-columns:1fr}
  .path{grid-template-columns:repeat(4,1fr)}
  .steps{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:640px){
  .top{position:static}
  .top-in{gap:6px}
  .logo{font-size:21px}
  .nav{order:3; width:100%; margin:0; justify-content:space-between; gap:0}
  .nav a{padding:8px 6px; font-size:14px}
  .bbb img{width:160px}
  .top .bbb{margin-left:auto}
  .hero{padding-top:14px}
  .hero-title{font-size:40px}
  .log{height:320px}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stats .stat:last-child{grid-column:span 2}
  .path{grid-template-columns:repeat(2,1fr)}
  .lobes ul{columns:1}
  .kid-btns{grid-template-columns:1fr}
  .section{padding:48px 0}
  .ask .btn{padding:12px 14px}
}
@media (prefers-reduced-motion:reduce){
  *,*:before,*:after{animation:none !important; transition:none !important; scroll-behavior:auto !important}
}

/* ===== v1.1 additions ===== */
/* brain layers by stage */
.layer{opacity:0; transition:opacity .8s}
.pw{fill:none; stroke:#ffe27a; stroke-width:4; stroke-linecap:round; stroke-dasharray:6 10; opacity:.9}
.nr{fill:#fff6a8; stroke:#c48a00; stroke-width:2}
.brain.stage-2 #neurons,.brain.stage-3 #neurons,.brain.stage-4 #neurons,.brain.stage-5 #neurons,.brain.stage-6 #neurons,.brain.stage-7 #neurons{opacity:1}
.brain.stage-3 #pathways,.brain.stage-4 #pathways,.brain.stage-5 #pathways,.brain.stage-6 #pathways,.brain.stage-7 #pathways{opacity:1}
.brain.stage-4 #muscles,.brain.stage-5 #muscles,.brain.stage-6 #muscles,.brain.stage-7 #muscles{opacity:1}
.brain.stage-5 #glasses,.brain.stage-6 #glasses,.brain.stage-7 #glasses{opacity:1}
.brain.stage-2 .nr,.brain.stage-3 .nr,.brain.stage-4 .nr,.brain.stage-5 .nr,.brain.stage-6 .nr,.brain.stage-7 .nr{animation:fire 2.4s ease-in-out infinite}
.nr:nth-child(2n){animation-delay:.4s !important}.nr:nth-child(3n){animation-delay:.9s !important}.nr:nth-child(5n){animation-delay:1.5s !important}
@keyframes fire{0%,100%{opacity:.35; r:4}50%{opacity:1; r:6.5}}
.brain.stage-3 .pw,.brain.stage-4 .pw,.brain.stage-5 .pw,.brain.stage-6 .pw,.brain.stage-7 .pw{animation:flow 2.2s linear infinite}
@keyframes flow{to{stroke-dashoffset:-32}}
.brain.spark .nr{animation:fire .5s ease-in-out 2 !important; opacity:1}
.brain.spark #pathways{opacity:1}
.brain.spark .pw{animation:flow .6s linear 3}
/* growth widget */
.growth{display:grid; grid-template-columns:repeat(3,1fr); gap:6px; margin-top:10px}
.growth div{background:#fff; border:2.5px solid var(--line); border-radius:10px; padding:6px 4px}
.growth b{display:block; font:800 20px/1.1 var(--display); color:var(--purple-d); transition:transform .3s}
.growth b.bump{transform:scale(1.25); color:var(--pink-d)}
.growth span{font-size:11px; color:var(--ink2)}
/* ticker */
.ticker-wrap{padding-bottom:12px}
.ticker{overflow:hidden; white-space:nowrap; font-size:14px; color:#f1ecff; border-top:1px dashed rgba(255,255,255,.25); padding-top:8px}
.ticker span{display:inline-block; padding-right:40px; animation:tick 40s linear infinite}
.ticker:hover span{animation-play-state:paused}
@keyframes tick{from{transform:translateX(0)}to{transform:translateX(-50%)}}
/* feed form */
.tabs{grid-template-columns:repeat(4,1fr)}
.tab-help{margin:-6px 0 12px}
.source{border:3px solid var(--line); border-radius:12px; padding:10px 12px; margin:0 0 14px}
.source legend{font-weight:800; padding:0 6px}
.source label{display:flex; gap:10px; align-items:flex-start; padding:6px 0; font-size:15px; cursor:pointer}
.source input{width:20px; height:20px; margin-top:2px; accent-color:var(--pink-d); flex:0 0 auto}
/* mission */
.mission-sec{background:linear-gradient(180deg,#f1fbff,var(--bg))}
.mission-grid{display:grid; grid-template-columns:1.2fr 1fr; gap:34px; align-items:start}
.mission-grid .btn{margin:6px 8px 0 0}
.rules-card{padding:20px}
.checks{list-style:none; padding:0; margin:0}
.checks li{position:relative; padding:0 0 12px 30px; color:var(--ink2)}
.checks li:before{content:"✓"; position:absolute; left:0; top:-2px; width:22px; height:22px; border-radius:7px; background:#bff3d4; border:2px solid var(--line); font:800 14px/20px var(--display); text-align:center; color:var(--ink)}
.checks b{color:var(--ink)}
/* evolution log */
.evo-sec{background:#fff9d9}
.evo-scroll{display:flex; gap:16px; overflow-x:auto; padding:10px 4px 18px; scroll-snap-type:x mandatory; -webkit-overflow-scrolling:touch}
.evo-card{flex:0 0 min(86vw,360px); scroll-snap-align:start; overflow:hidden; display:flex; flex-direction:column}
.evo-card img{width:100%; height:auto; aspect-ratio:480/420; object-fit:cover; border-bottom:3px solid var(--line); background:#fff}
.evo-body{padding:14px 16px 18px}
.evo-tag{display:inline-block; font:700 12px/1 var(--ui); background:var(--yellow); border:2px solid var(--line); border-radius:6px; padding:5px 7px; margin-bottom:8px}
.evo-body h3{font-size:22px; margin:0 0 6px}
.evo-body p{margin:0 0 8px; color:var(--ink2)}
.evo-card.locked{background:repeating-linear-gradient(135deg,#fff,#fff 10px,#fff4e6 10px,#fff4e6 20px); align-items:center; justify-content:center; min-height:300px; text-align:center}
.evo-locked{padding:20px}
.evo-locked span{display:block; font-size:54px; filter:grayscale(1); opacity:.6}
.evo-locked b{display:block; font:800 22px var(--display); margin:6px 0}
.evo-locked p{color:var(--ink2); margin:0}
/* under the hood */
.hood-sec{background:linear-gradient(180deg,var(--bg),#f3ecff)}
.hood-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:14px; margin:20px 0}
.hood{padding:18px 16px; text-align:left; cursor:pointer; font:inherit; color:var(--ink); display:flex; flex-direction:column; gap:6px; transition:transform .12s}
.hood:hover{transform:translateY(-3px)}
.hood-ico{font-size:30px}
.hood b{font:800 19px/1.2 var(--display)}
.hood span:last-child{color:var(--ink2); font-size:14px}
/* chat visuals + code */
.viz-wrap{margin:10px 0 4px; background:#fffdf9; border:2px solid var(--line); border-radius:12px; padding:8px; max-width:420px}
.msg pre{margin:10px 0 0; background:#2b2340; color:#f8f4ff; border-radius:10px; padding:12px; font:12.5px/1.5 ui-monospace, Menlo, Consolas, monospace; overflow-x:auto; white-space:pre; max-width:100%}
.msg .copybtn{margin-top:6px}
.msg .ttl{font:800 17px/1.2 var(--display); display:block; margin-bottom:6px}
/* blog teaser */
.blog-sec{background:#f1fbff}
.posts{display:grid; grid-template-columns:repeat(3,1fr); gap:16px; margin:20px 0}
.post{display:flex; flex-direction:column; gap:6px; padding:18px; text-decoration:none; color:var(--ink); transition:transform .12s}
.post:hover{transform:translateY(-3px)}
.post time{font-size:12px; color:var(--ink2); font-weight:700}
.post b{font:800 20px/1.2 var(--display)}
.post span{color:var(--ink2); font-size:14px}
/* doc pages */
.doc{padding:40px 0 60px}
.doc .wrap{max-width:860px}
.doc h2{font-size:28px; margin-top:1.4em}
.doc p,.doc li{color:#3e3655}
.crumbs{font-size:14px; margin-bottom:12px}
.doc .viz-wrap{max-width:560px; margin:18px 0}
.doc pre{background:#2b2340; color:#f8f4ff; border-radius:12px; padding:14px; font:13px/1.5 ui-monospace, Menlo, Consolas, monospace; overflow-x:auto}
.doc .callout{background:#fff6cf; border:2px dashed var(--yellow-d); border-radius:12px; padding:12px 16px; margin:18px 0}
.evo-full{display:grid; grid-template-columns:1fr 1.2fr; gap:24px; align-items:start; margin:20px 0 40px}
.evo-full img{width:100%; height:auto; border:3px solid var(--line); border-radius:16px; background:#fff}
.evo-full ul{padding-left:20px}
.evo-full h3{margin-top:0}
.lesson-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:16px; margin:20px 0}
.lesson-grid .post b{font-size:19px}
.api-ex{font-size:14px}
@media (max-width:980px){
  .mission-grid{grid-template-columns:1fr}
  .hood-grid,.posts,.lesson-grid{grid-template-columns:1fr 1fr}
  .evo-full{grid-template-columns:1fr}
}
@media (max-width:640px){
  .tabs{grid-template-columns:repeat(2,1fr)}
  .hood-grid,.posts,.lesson-grid{grid-template-columns:1fr}
  .growth b{font-size:17px}
  .nav a{padding:8px 4px; font-size:13px}
}